Adjustable dust-collector



M. W. LEONHARDT.

ADJUSTABLE DUST COLLECTOR.

APPLICATION FILED JUNE 13 1921.

Patented Oct. 11, 1921.

MARTIN W. LEONHARIDT, OF CHATTANOOGA, TENNESSEE.

ADJUSTABLE DUST COLLECTOR.

Specification of Letters Patent.

Patented Oct. 11, 1921.

Application filed June 1 3, 1921. Serial No. 477,270.

T 0 all whom it may concern Be it known that I, MARTIN \V. LEON I-IARDT, a citizen of the United States, residing at Chattanooga, in the county of I-Iamilton and State of Tennessee, have invented certain new and useful Improvements in Adjustable Dust-Collectors, of which the following is a specification.

This invention relates to certain new and useful improvements in adjustable dust collectors, the peculiarities of which will be hereinafter fully described and claimed.

The main object of this invention is to improve the construction shown in my former application- Serial Number M9381 filed March 3rd, 1921, so that the means for adjusting the tongues of the split tubular discharge pipe will be located in the outgoing purified air and out of the path of the whirling dust-laden air; secondly, to avoid the entrance of dust-laden air between the tongues of the tubular discharge pipe; thirdly, to vary the length of the depending tubular discharge pipe; and fourthly, to facilitate attachment of my tubular discharge pipe in the proper location in old dust collectors.

In the accompanying drawing on which like reference letters indicate corresponding parts, Figure 1 represents a vertical sectional View of a cyclone dust collector embodying my invention, the adjustable tubular discharge pipe being broken away to show the operating means of adjustment; Fig. 2, a plan view of my slidable tubular discharge pipe in its guiding sleeve or collar, the section being taken on 2-2 of Fig. 1; Fig. 3, a similar sectional plan view of the lower end of my tubular discharge pipe, the section being taken on 3-3 of Fig. 1; Fig. 4, an enlarged side View of my tubular discharge pipe indicating its attachment to an old collector and its adjustability, vertically and ciroumferentially; and Fig. 5, a plan View of Fig. 4;.

The letter A designates the upper portion and B the conical bottom and C tl e tangential inlet pipe of a cyclone dust collector of any approved type. In the top D is located a tubular discharge pipe E, that is adjustable vertically, being slidably mounted in a collar or guide F and supported by frictional contact, or by a pin inserted in matching holes in the collar and pipe as indicated in Fig. 1. Handles G, or other means, facilitate such vertical adjustment of the said pipe, so that its bottom end will be'located in the largest diameter of the. collector, or in other suitable position, as indicated by dotted lines Fig. 1, in order to obtain the proper action of the collector. The lower end of the pipe is divided to form overlapping tongues,the forward edge of each tongue overlapping the rear edge of the adjacent tongue in the direction of movement of the whirling dust-laden air entering the collector, as indicated by the arrow 1 Fig. 1, so that the dust will not enter the joints between said tongues.

In order to adjust the lower end of said pipe, a band I-I encircles the pipe and the ends of said band, which is flexible, pass to the inside of the pipe and are connected to a shaft I, vertically mounted on the inside of the pipe, and provided with a ratchet J and pawl K to resist the reaction ofthe compressed pipe. size of said pipe at its lower end, the proper separation of the purified air is effected as described in my prior application. In this construction I show the operating shaft I,

B the variation of the inside of the discharge pipe, where it will not deflect the whirling currents of dust laden air as in my prior application. The

hand wheel M at the top of the shaft, is

readily operated through a hand hole L provided with a cap, located adjacent and designated N, Fig. 1.

In the application of my invention to old collectors, it is only necessary to remove the old discharge pipe which is generally larger than is required and substitute my improved pipe; and in order to fill the annular opening left between my smaller pipe and the opening in the top of the collector for the pipe formerly used, I provide a ring flange 0, Fig. 4-, surmounted by a larger flange P,

having holes for fastening screws or other I means. The adjacent upper flange covers the joint between the lower flange and the top of the collector. The collar F in Fig. 1, is extended downward to form a sleeve F Fig. 41-, that acts as a guide for the discharge pipe E adjustably mounted therein, as it is often necessary in old collectors to vary the location of the pipe E vertically, to accord with the height of the middle plane of such collector and secure the best efficiency of operation.

I claim: I

1. A cyclone dust collector comprising a tubular discharge pipe. having a divlded WV. W...

lower end forming over lapping tongues, adjusting means for said tongues adapted to vary the degree of overlap, and means located within said discharge pipe to operate said adjusting means.

2. A cyclone dust collector comprising a depending tubular discharge pipe having a divided lower end forming overlapping tongues, a flexible band passing around outside said tongues to compress them,said

tongues having holes for the entrance of said flexible band,a vertical winding shaft located inside said pipe and engaged by said flexible band, and means to restrain the backward rotation of said shaft under tension of said band due to the reaction of said tongues. V a

3, A cyclone dust collector comprising a dependlng tubular discharge pipe having a divided lower end forming overlapping tongues,the forward edge of each tongue in the direction of travel of the dust-laden air lapping outside the rear edge of the next adjacent tongue,and means adjustably to vary'the amount o'f'said overlap.

4:. A cylindrical dust collector comprising a depending tubular discharge pipe having.

a divided end forming overlapping tongues, and means to vary ad ustably the amount or overlap,-sa1d means being located inside said pipe,-said collector having a capped opening to the inside of the collector for admitting the hand of the operator to effect saidadjustment of tongues while the collector isin operation.

5. An adjustable tubular discharge pipe for a cyclone dust collector comprising a pipe having one end divided into overlapping tongues, a flexible band mounted outside said tongues, a winding shaft mounted discharge pipe having a divided com- 'pressible lower end, means to ad ust the compression of said end, a ring flange near the upper end of said pipe, and a larger overlapping ring flange adjacently located above,--one flange adapted to fill the annular opening left at the top of the collector and the other adapted to be secured to the upper side of the top of the collector and cover the joint of the lower flange with said top. 7

8. A cyclone dust collector attachment comprising a guiding sleeve, means to sup- 1 port said sleeve in the top of a collector, a tubular discharge pipe mounted in said sleeve and having overlapping adjustable tongues at its lower end, and means toadjust the amount of overlap and thus varythe area of said lower end.

In testimony whereof I have aflixed my signature.

MARTIN Wmnonnaianr. 

